My mother-in-law used to wash down her ceilings and walls each spring because she heats her home with coal. After painting with interior Show Kote, she waited three years to wash them and she could hardly see where she was going because the walls stayed so clean. Plus it was much easier to wash and it still looks like new. Thanks to Wall Kote, she can have many more years of dust-resistant, durable, beautiful walls and ceilings in her house.